Optical image capturing system

ABSTRACT

A three-piece optical lens for capturing image and a three-piece optical module for capturing image, along the optical axis in order from an object side to an image side, include a first lens with positive refractive power; a second lens with refractive power; and a third lens with refractive power; and at least one of the image-side surface and object-side surface of each of the three lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates generally to an optical system, and moreparticularly to a compact optical image capturing system for anelectronic device.

2. Description of Related Art

In recent years, with the rise of portable electronic devices havingcamera functionalities, the demand for an optical image capturing systemis raised gradually. The image sensing device of ordinary photographingcamera is commonly selected from charge coupled device (CCD) orcomplementary metal-oxide semiconductor sensor (CMOS Sensor). Inaddition, as advanced semiconductor manufacturing technology enables theminimization of pixel size of the image sensing device, the developmentof the optical image capturing system towards the field of high pixels.Therefore, the requirement for high imaging quality is rapidly raised.

The conventional optical system of the portable electronic deviceusually has a two-piece lens. However, the optical system is asked totake pictures in a dark environment, in other words, the optical systemis asked to have a large aperture. An optical system with large apertureusually has several problems, such as large aberration, poor imagequality at periphery of the image, and hard to manufacture. In addition,an optical system of wide-angle usually has large distortion. Therefore,the conventional optical system provides high optical performance asrequired.

It is an important issue to increase the quantity of light entering thelens and the angle of field of the lens. In addition, the modern lens isalso asked to have several characters, including high pixels, high imagequality, small in size, and high optical performance.

BRIEF SUMMARY OF THE INVENTION

The aspect of embodiment of the present disclosure directs to an opticalimage capturing system and an optical image capturing lens which usecombination of refractive powers, convex and concave surfaces ofthree-piece optical lenses (the convex or concave surface in thedisclosure denotes the geometrical shape of an image-side surface or anobject-side surface of each lens on an optical axis) to increase thequantity of incoming light of the optical image capturing system, and toimprove imaging quality for image formation, so as to be applied tominimized electronic products.

The term and its definition to the lens parameter in the embodiment ofthe present are shown as below for further reference.

The lens parameter related to a length or a height in the lens:

A height for image formation of the optical image capturing system isdenoted by HOI. A height of the optical image capturing system isdenoted by HOS. A distance from the object-side surface of the firstlens to the image-side surface of the third lens is denoted by InTL. Adistance from the image-side surface of the third lens to the imageplane is denoted by InB. InTL+InB=HOS. A distance from the first lens tothe second lens is denoted by IN12 (instance). A central thickness ofthe first lens of the optical image capturing system on the optical axisis denoted by TP1 (instance).

The lens parameter related to a material in the lens:

An Abbe number of the first lens in the optical image capturing systemis denoted by NA1 (instance). A refractive index of the first lens isdenoted by Nd1 (instance).

The lens parameter related to a view angle in the lens:

A view angle is denoted by AF. Half of the view angle is denoted by HAF.A major light angle is denoted by MRA.

The lens parameter related to exit/entrance pupil in the lens

An entrance pupil diameter of the optical image capturing system isdenoted by HEP.

The lens parameter related to a depth of the lens shape

A distance in parallel with an optical axis from a maximum effectivediameter position to an axial point on the object-side surface of thethird lens is denoted by InRS31 (instance). A distance in parallel withan optical axis from a maximum effective diameter position to an axialpoint on the image-side surface of the third lens is denoted by InRS32(instance).

The lens parameter related to the lens shape:

A critical point C is a tangent point on a surface of a specific lens,and the tangent point is tangent to a plane perpendicular to the opticalaxis and the tangent point cannot be a crossover point on the opticalaxis. To follow the past, a distance perpendicular to the optical axisbetween a critical point C21 on the object-side surface of the secondlens and the optical axis is HVT21 (instance). A distance perpendicularto the optical axis between a critical point C31 on the object-sidesurface of the third lens and the optical axis is HVT31 (instance). Adistance perpendicular to the optical axis between a critical point C32on the image-side surface of the third lens and the optical axis isHVT32 (instance). The object-side surface of the third lens has oneinflection point IF311 which is nearest to the optical axis, and thesinkage value of the inflection point IF311 is denoted by SGI311. Adistance perpendicular to the optical axis between the inflection pointIF311 and the optical axis is HIF311 (instance). The image-side surfaceof the third lens has one inflection point IF321 which is nearest to theoptical axis, and the sinkage value of the inflection point IF321 isdenoted by SGI321 (instance). A distance perpendicular to the opticalaxis between the inflection point IF321 and the optical axis is HIF321(instance). The object-side surface of the third lens has one inflectionpoint IF312 which is the second nearest to the optical axis, and thesinkage value of the inflection point IF312 is denoted by SGI312(instance). A distance perpendicular to the optical axis between theinflection point IF312 and the optical axis is HIF312 (instance). Theimage-side surface of the third lens has one inflection point IF322which is the second nearest to the optical axis, and the sinkage valueof the inflection point IF322 is denoted by SGI322 (instance). Adistance perpendicular to the optical axis between the inflection pointIF322 and the optical axis is HIF322 (instance).

The lens parameter related to an aberration:

Optical distortion for image formation in the optical image capturingsystem is denoted by ODT. TV distortion for image formation in theoptical image capturing system is denoted by TDT. Further, the range ofthe aberration offset for the view of image formation may be limited to50%-100% field. An offset of the spherical aberration is denoted by DFS.An offset of the coma aberration is denoted by DFC.

The present invention provides an optical image capturing system, inwhich the third lens is provided with an inflection point at theobject-side surface or at the image-side surface to adjust the incidentangle of each view field and modify the ODT and the TDT. In addition,the surfaces of the third lens are capable of modifying the optical pathto improve the imagining quality.

The optical image capturing system of the present invention includes afirst lens, a second lens, and a third lens, in order along an opticalaxis from an object side to an image side. The first lens has positiverefractive power, and the third lens has refractive power. At least twoof the three lenses each has at least an inflection point on a surfacethereof. Both the object-side surface and the image-side surface of thethird lens are aspheric surfaces. The optical image capturing systemsatisfies:1.2≦f/HEP≦3.5; 0.5≦HOS/f≦3.0; and 0<Σ|InRS|/InTL≦3;

where f is a focal length of the optical image capturing system; HEP isan entrance pupil diameter of the optical image capturing system; andHOS is a distance in parallel with the optical axis between anobject-side surface, which face the object side, of the first lens andthe image plane; InTL is a distance between the object-side surface ofthe first lens and the image-side surface of the third lens; and Σ|InRS|is of an sum of absolute values of the displacements in parallel withthe optical axis of each lens with refractive power from the centralpoint to the point at the maximum effective radius, i.e.Σ|InRS|=InRSO+InRSI while InRSO is of a sum of absolute values of thedisplacements in parallel with the optical axis of each lens withrefractive power from the central point on the object-side surface tothe point at the maximum effective radius of the object-side surface andInRSI is of a sum of absolute values of the displacements in parallelwith the optical axis of each lens with refractive power from thecentral point on the image-side surface to the point at the maximumeffective radius of the image-side surface.

The present invention further provides an optical image capturingsystem, including a first lens, a second lens, and a third lens in orderalong an optical axis from an object side to an image side. The firstlens has positive refractive power, and both the object-side surface andthe image-side surface thereof are aspheric surfaces. The second lenshas refractive power, and has at least an inflection point on a surfacethereof. The third lens has refractive power, and has at least aninflection point on a surface thereof, and both the object-side surfaceand the image-side surface thereof are aspheric surfaces. The opticalimage capturing system satisfies:1.2≦f/HEP≦3.5; 0.5≦HOS/f≦3.0; 0<Σ|InRS|/InTL≦3; |TDT|<60%; and|ODT|≦50%;

where f is a focal length of the optical image capturing system; HEP isan entrance pupil diameter of the optical image capturing system; HOS isa distance in parallel with the optical axis between an object-sidesurface, which face the object side, of the first lens and the imageplane; HAF is a half of the view angle of the optical image capturingsystem; InTL is a distance between the object-side surface of the firstlens and the image-side surface of the third lens; and Σ|InRS| is of ansum of absolute values of the displacements in parallel with the opticalaxis of each lens with refractive power from the central point to thepoint at the maximum effective radius, i.e. Σ|InRS|=InRSO+InRSI whileInRSO is of a sum of absolute values of the displacements in parallelwith the optical axis of each lens with refractive power from thecentral point on the object-side surface to the point at the maximumeffective radius of the object-side surface and InRSI is of a sum ofabsolute values of the displacements in parallel with the optical axisof each lens with refractive power from the central point on theimage-side surface to the point at the maximum effective radius of theimage-side surface; TDT is a TV distortion; and ODT is an opticaldistortion.

The present invention further provides an optical image capturingsystem, including a first lens, a second lens, and a third lens, inorder along an optical axis from an object side to an image side. Thefirst lens has positive refractive power, and both an object-sidesurface and an image-side surface thereof are aspheric surfaces. Thesecond lens has negative refractive power, and at least an object-sidesurface and an image-side surface thereof each has at least aninflection point. The third lens has refractive power, and at least anobject-side surface and an image-side surface thereof each has at leastan inflection point, and are aspheric surfaces. The optical imagecapturing system satisfies:1.2≦f/HEP≦3.5; 0.4≦|tan(HAF)|≦3.0; 0.5≦HOS/f≦3.0; |TDT|<1.5%;|ODT|≦2.5%; and 0<Σ|InRS|/InTL≦3;

where f is a focal length of the optical image capturing system; HEP isan entrance pupil diameter of the optical image capturing system; HOS isa distance in parallel with the optical axis between an object-sidesurface, which face the object side, of the first lens and the imageplane; HAF is a half of the view angle of the optical image capturingsystem; InTL is a distance between the object-side surface of the firstlens and the image-side surface of the third lens; and Σ|InRS| is of ansum of absolute values of the displacements in parallel with the opticalaxis of each lens with refractive power from the central point to thepoint at the maximum effective radius, i.e. Σ|InRS|=InRSO+InRSI whileInRSO is of a sum of absolute values of the displacements in parallelwith the optical axis of each lens with refractive power from thecentral point on the object-side surface to the point at the maximumeffective radius of the object-side surface and InRSI is of a sum ofabsolute values of the displacements in parallel with the optical axisof each lens with refractive power from the central point on theimage-side surface to the point at the maximum effective radius of theimage-side surface; TDT is a TV distortion; and ODT is an opticaldistortion.

In an embodiment, the optical image capturing system further includes animage sensor with a size less than 1/1.2″ in diagonal, a preferred sizeis 1/2.3″, and a pixel less than 1.4 μm. A preferable pixel size of theimage sensor is less than 1.12 μm, and more preferable pixel size isless than 0.9 μm. A 16:9 image sensor is available for the optical imagecapturing system of the present invention.

In an embodiment, the optical image capturing system of the presentinvention is available to a million pixels or higher recording, andprovides high quality of image.

In an embodiment, a height of the optical image capturing system (HOS)can be reduced while |f1|>f3.

In an embodiment, when the lenses satisfy |f2|>|f1|, the second lenscould have weak positive refractive power or weak negative refractivepower. When the second lens has weak positive refractive power, it mayshare the positive refractive power of the first lens, and on thecontrary, when the second lens has weak negative refractive power, itmay finely modify the aberration of the system.

In an embodiment, the third lens could have positive refractive power,and an image-side surface thereof is concave, it may reduce back focallength and size. Besides, the third lens could have at least aninflection point on a surface thereof, which may reduce an incidentangle of the light of an off-axis field of view and modify theaberration of the off-axis field of view. It is preferable that bothsurfaces of the third lens have at least an inflection point on asurface thereof.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

The present invention will be best understood by referring to thefollowing detailed description of some illustrative embodiments inconjunction with the accompanying drawings, in which

FIG. 1A is a schematic diagram of a first preferred embodiment of thepresent invention;

FIG. 1B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the first embodiment of thepresent application;

FIG. 1C shows a curve diagram of TV distortion of the optical imagecapturing system of the first embodiment of the present application;

FIG. 2A is a schematic diagram of a second preferred embodiment of thepresent invention;

FIG. 2B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the second embodiment of thepresent application;

FIG. 2C shows a curve diagram of TV distortion of the optical imagecapturing system of the second embodiment of the present application;

FIG. 3A is a schematic diagram of a third preferred embodiment of thepresent invention;

FIG. 3B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the third embodiment of thepresent application;

FIG. 3C shows a curve diagram of TV distortion of the optical imagecapturing system of the third embodiment of the present application;

FIG. 4A is a schematic diagram of a fourth preferred embodiment of thepresent invention;

FIG. 4B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the fourth embodiment of thepresent application;

FIG. 4C shows a curve diagram of TV distortion of the optical imagecapturing system of the fourth embodiment of the present application;

FIG. 5A is a schematic diagram of a fifth preferred embodiment of thepresent invention;

FIG. 5B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the fifth embodiment of thepresent application; and

FIG. 5C shows a curve diagram of TV distortion of the optical imagecapturing system of the fifth embodiment of the present application.

DETAILED DESCRIPTION OF THE INVENTION

An optical image capturing system of the present invention includes afirst lens, a second lens, and a third lens from an object side to animage side. The optical image capturing system further is provided withan image sensor at an image plane.

The optical image capturing system works in three wavelengths, including486.1 nm, 587.5 nm, 555 nm, and 656.2 nm, wherein 587.5 nm is the mainreference wavelength, and 555 nm is the reference wavelength forobtaining the technical characters.

The optical image capturing system of the present invention satisfies0.5≦ΣPPR/|ΣNPR|≦4.5, and a preferable range is 1≦ΣPPR/|ΣNPR|≦3.5, wherePPR is a ratio of the focal length f of the optical image capturingsystem to a focal length fp of each of lenses with positive refractivepower; NPR is a ratio of the focal length f of the optical imagecapturing system to a focal length fn of each of lenses with negativerefractive power; and ΣNPR is a sum of the PNRs of each negative lens.It is helpful to control of an entire refractive power and an entirelength of the optical image capturing system.

HOS is a height of the optical image capturing system, and when theratio of HOS/f approaches to 1, it is helpful to decrease of size andincrease of imaging quality.

In an embodiment, the optical image capturing system of the presentinvention satisfies 0<ΣPP≦200 and f1/ΣPP≦0.85, and a preferable range is0<ΣPP≦150 and 0.01≦f1/ΣPP≦0.6, where ΣPP is a sum of a focal length fpof each lens with positive refractive power, and ΣNP is a sum of a focallength fp of each lens with negative refractive power. It is helpful tocontrol of focusing capacity of the system and redistribution of thepositive refractive powers of the system to avoid the significantaberration in early time.

The first lens has positive refractive power, and an object-sidesurface, which faces the object side, thereof is convex. It may modifythe positive refractive power of the first lens as well as shorten theentire length of the system.

The second lens has negative refractive power, which may correct theaberration of the first lens.

The third lens has positive refractive power, and an image-side surface,which faces the image side, thereof is concave. It may share thepositive refractive power of the first lens and shorten the back focallength to keep the system miniaturized. Besides, the third has at leastan inflection point on at least a surface thereof to reduce the incidentangle of the off-axis view angle light. Preferable, both the object-sidesurface and the image-side surface each has at least an inflectionpoint.

The image sensor is provided on the image plane. The optical imagecapturing system of the present invention satisfies HOS/HOI≦3 and0.5≦HOS/f≦3.0, and a preferable range is 1≦HOS/HOI≦2.5 and 1≦HOS/f≦2,where HOI is height for image formation of the optical image capturingsystem, i.e., the maximum image height, and HOS is a height of theoptical image capturing system, i.e. a distance on the optical axisbetween the object-side surface of the first lens and the image plane.It is helpful to reduction of size of the system for used in compactcameras.

The optical image capturing system of the present invention further isprovided with an aperture to increase image quality.

In the optical image capturing system of the present invention, theaperture could be a front aperture or a middle aperture, wherein thefront aperture is provided between the object and the first lens, andthe middle is provided between the first lens and the image plane. Thefront aperture provides a long distance between an exit pupil of thesystem and the image plane, which allows more elements to be installed.The middle could enlarge a view angle of view of the system and increasethe efficiency of the image sensor. The optical image capturing systemsatisfies 0.5≦InS/HOS≦1.1, and a preferable range is 0.6≦InS/HOS≦1,where InS is a distance between the aperture and the image plane. It ishelpful to size reduction and wide angle.

The optical image capturing system of the present invention satisfies0.45≦ΣTP/InTL≦0.95, where InTL is a distance between the object-sidesurface of the first lens and the image-side surface of the third lens,and ΣTP is a sum of central thicknesses of the lenses on the opticalaxis. It is helpful to the contrast of image and yield rate ofmanufacture, and provides a suitable back focal length for installationof other elements.

The optical image capturing system of the present invention satisfies0.1≦|R1/R2|≦0.6, and a preferable range is 0.1≦|R1/R2|≦0.5, where R1 isa radius of curvature of the object-side surface of the first lens, andR2 is a radius of curvature of the image-side surface of the first lens.It provides the first lens with a suitable refractive power to reducethe increase rate of the spherical aberration.

The optical image capturing system of the present invention satisfies−200<(R5−R6)/(R5+R6)<30, where R5 is a radius of curvature of theobject-side surface of the third lens, and R6 is a radius of curvatureof the image-side surface of the third lens. It may modify theastigmatic field curvature.

The optical image capturing system of the present invention satisfies0<IN12/f≦0.25, and a preferable range is 0.01≦IN12/f≦0.20, where IN12 isa distance on the optical axis between the first lens and the secondlens. It may correct chromatic aberration and improve the performance.

The optical image capturing system of the present invention satisfies1≦(TP1+IN12)/TP2≦10, where TP1 is a central thickness of the first lenson the optical axis, and TP2 is a central thickness of the second lenson the optical axis. It may control the sensitivity of manufacture ofthe system and improve the performance.

The optical image capturing system of the present invention satisfies0.2≦(TP3+IN23)/TP2≦3, where TP2 is a central thickness of the secondlens on the optical axis, TP3 is a central thickness of the third lenson the optical axis, and IN23 is a distance between the second lens andthe third lens. It may control the sensitivity of manufacture of thesystem and improve the performance.

The optical image capturing system of the present invention satisfies0.1≦TP2/ΣTP≦0.9, and a preferable range is 0.2≦TP2/ΣTP≦0.8, where TP2 isa central thickness of the second lens on the optical axis and ΣTP is asum of the central thicknesses of all the lenses on the optical axis. Itmay finely modify the aberration of the incident rays and reduce theheight of the system.

The optical image capturing system of the present invention satisfies 0mm<|InRS11|+|InRS12|≦2 mm and 1.01≦(|InRS11|+TP1+|InRS12|)/TP1≦3, whereInRS11 is a displacement in parallel with the optical axis from a pointon the object-side surface of the first lens, through which the opticalaxis passes, to a point at the maximum effective radius of theobject-side surface of the first lens, wherein InRS11 is positive whilethe displacement is toward the image side, and InRS11 is negative whilethe displacement is toward the object side; InRS12 is a displacement inparallel with the optical axis from a point on the image-side surface ofthe first lens, through which the optical axis passes, to a point at themaximum effective radius of the image-side surface of the first lens;and TP1 is a central thickness of the first lens on the optical axis. Itmay control a ratio of the central thickness of the first lens and theeffective radius thickness (thickness ratio) to increase the yield rateof manufacture.

The optical image capturing system of the present invention satisfies 0mm<|InRS21|+|InRS22|≦2 mm and 1.01≦(|InRS21|+TP2+|InRS22|)/TP2≦5, whereInRS21 is a displacement in parallel with the optical axis from a pointon the object-side surface of the second lens, through which the opticalaxis passes, to a point at the maximum effective radius of theobject-side surface of the second lens, wherein InRS21 is positive whilethe displacement is toward the image side, and InRS21 is negative whilethe displacement is toward the object side; InRS22 is a displacement inparallel with the optical axis from a point on the image-side surface ofthe second lens, through which the optical axis passes, to a point atthe maximum effective radius of the image-side surface of the secondlens; and TP2 is a central thickness of the second lens on the opticalaxis. It may control a ratio of the central thickness of the second lensand the effective radius thickness (thickness ratio) to increase theyield rate of manufacture.

The optical image capturing system of the present invention satisfies 0mm<|InRS31|+|InRS32|≦2 mm and 1.01≦(|InRS31|+TP3+|InRS32|)/TP3≦10, whereInRS31 is a displacement in parallel with the optical axis from a pointon the object-side surface of the third lens, through which the opticalaxis passes, to a point at the maximum effective radius of theobject-side surface of the third lens, wherein InRS31 is positive whilethe displacement is toward the image side, and InRS31 is negative whilethe displacement is toward the object side; InRS32 is a displacement inparallel with the optical axis from a point on the image-side surface ofthe third lens, through which the optical axis passes, to a point at themaximum effective radius of the image-side surface of the third lens;and TP3 is a central thickness of the third lens on the optical axis. Itmay control a ratio of the central thickness of the second lens and theeffective radius thickness (thickness ratio) to increase the yield rateof manufacture.

The optical image capturing system of the present invention satisfies0≦Σ|InRS|≦15 mm, where Σ|InRS| is of an sum of absolute values of thedisplacements in parallel with the optical axis of each lens withrefractive power from the central point to the point at the maximumeffective radius, i.e. Σ|InRS|=InRSO+InRSI while InRSO is of a sum ofabsolute values of the displacements in parallel with the optical axisof each lens with refractive power from the central point on theobject-side surface to the point at the maximum effective radius of theobject-side surface, i.e. InRSO=|InRS11|+|InRS21|+|InRS31| and InRSI isof a sum of absolute values of the displacements in parallel with theoptical axis of each lens with refractive power from the central pointon the image-side surface to the point at the maximum effective radiusof the image-side surface, i.e. InRSI=|InRS12|+|InRS22|+|InRS32|. It mayincrease the capability of modifying the off-axis view field aberrationof the system. It may increase the capability of modifying the off-axisview field aberration of the system.

The optical image capturing system of the present invention satisfies0≦Σ|InRS|/InTL≦3 and 0<Σ|InRS|/HOS≦2. It may reduce the total height ofthe system and increase the capability of modifying the off-axis viewfield aberration of the system.

The optical image capturing system of the present invention satisfies0<|InRS21|+|InRS22|+|InRS31|+|InRS32|≦8 mm;0<(|InRS21|+|InRS22|+|InRS31|+|InRS32|)/InTL≦3; and0<(|InRS21|+|InRS22|+|InRS31|+|InRS32|)/HOS≦2. It could increase theyield rate of manufacture of the two lenses, which are the first and thesecond closest to the image side, and increase the capability ofmodifying the off-axis view field aberration of the system.

The optical image capturing system of the present invention satisfiesHVT21≧0 mm and HVT22≧0 mm, where HVT21 a distance perpendicular to theoptical axis between the inflection point on the object-side surface ofthe second lens and the optical axis; and HVT22 a distance perpendicularto the optical axis between the inflection point on the image-sidesurface of the second lens and the optical axis. It may efficientlymodify the off-axis view field aberration of the system.

The optical image capturing system of the present invention satisfiesHVT31≧0 mm and HVT32≧0 mm, where HVT31 a distance perpendicular to theoptical axis between the inflection point on the object-side surface ofthe third lens and the optical axis; and HVT32 a distance perpendicularto the optical axis between the inflection point on the image-sidesurface of the third lens and the optical axis. It may efficientlymodify the off-axis view field aberration of the system.

The optical image capturing system of the present invention satisfies0.2≦HVT32/HOI≦0.9, and preferable is 0.3≦HVT32/HOI≦0.8. It is helpful tocorrection of the aberration of the peripheral view field.

The optical image capturing system of the present invention satisfies0≦HVT32/HOS≦0.5, and preferable is 0.2≦HVT32/HOS≦0.45. It is helpful tocorrection of the aberration of the peripheral view field.

In an embodiment, the lenses of high Abbe number and the lenses of lowAbbe number are arranged in an interlaced arrangement that could behelpful to correction of aberration of the system.

An equation of aspheric surface isz=ch ²/[1+[1(k+1)c ² h ²]^(0.5) ]+A4h ⁴ +A6h ⁶ +A8h ⁸ +A10h ¹⁰ +A12h ¹²+A14h ¹⁴ +A16h ¹⁶ +A18h ¹⁸ +A20h ²⁰  (1)

where z is a depression of the aspheric surface; k is conic constant; cis reciprocal of radius of curvature; and A4, A6, A8, A10, A12, A14,A16, A18, and A20 are high-order aspheric coefficients.

In the optical image capturing system, the lenses could be made ofplastic or glass. The plastic lenses may reduce the weight and lower thecost of the system, and the glass lenses may control the thermal effectand enlarge the space for arrangement of refractive power of the system.In addition, the opposite surfaces (object-side surface and image-sidesurface) of the first to the third lenses could be aspheric that canobtain more control parameters to reduce aberration. The number ofaspheric glass lenses could be less than the conventional sphericalglass lenses that is helpful to reduction of the height of the system.

When the lens has a convex surface, which means that the surface isconvex around a position, through which the optical axis passes, andwhen the lens has a concave surface, which means that the surface isconcave around a position, through which the optical axis passes.

The optical image capturing system of the present invention further isprovided with a diaphragm to increase image quality.

In the optical image capturing system, the diaphragm could be a frontdiaphragm or a middle diaphragm, wherein the front diaphragm is providedbetween the object and the first lens, and the middle is providedbetween the first lens and the image plane. The front diaphragm providesa long distance between an exit pupil of the system and the image plane,which allows more elements to be installed. The middle diaphragm couldenlarge a view angle of view of the system and increase the efficiencyof the image sensor. The middle diaphragm is helpful to size reductionand wide angle.

The optical image capturing system of the present invention could beapplied in dynamic focusing optical system. It is superior in correctionof aberration and high imaging quality so that it could be allied inlots of fields.

We provide several embodiments in conjunction with the accompanyingdrawings for the best understanding, which are:

First Embodiment

As shown in FIG. 1A and FIG. 1B, an optical image capturing system 100of the first preferred embodiment of the present invention includes,along an optical axis from an object side to an image side, a first lens110, an aperture 100, a second lens 120, a third lens 130, an infraredrays filter 170, an image plane 180, and an image sensor 190.

The first lens 110 has positive refractive power, and is made ofplastic. An object-side surface 112 thereof, which faces the objectside, is a convex aspheric surface, and an image-side surface 114thereof, which faces the image side, is a concave aspheric surface.

The second lens 120 has negative refractive power, and is made ofplastic. An object-side surface 122 thereof, which faces the objectside, is a concave aspheric surface, and an image-side surface 124thereof, which faces the image side, is a convex aspheric surface, andthe image-side surface 124 has an inflection point. The second lens 120satisfies SGI221=−0.1526 mm and |SGI221|/(|SGI221|+TP2)=0.2292, whereSGI221 is a displacement in parallel with the optical axis from a pointon the image-side surface of the second lens, through which the opticalaxis passes, to the inflection point on the image-side surface, which isthe closest to the optical axis.

The second lens further satisfies HIF22|=0.5606 mm andHIF221/HOI=0.3128, where HIF221 is a displacement perpendicular to theoptical axis from a point on the image-side surface of the second lens,through which the optical axis passes, to the inflection point, which isthe closest to the optical axis.

The third lens 130 has positive refractive power, and is made ofplastic. An object-side surface 132, which faces the object side, is aconvex aspheric surface, and an image-side surface 134, which faces theimage side, is a concave aspheric surface. The object-side surface 132has two inflection points, and the image-side surface 134 has aninflection point. The third lens 130 satisfies SGI31|=0.0180 mm;SGI321=0.0331 mm and |SGI311|/(|SGI311+TP3)=0.0339 and|SGI321|/(|SGI321+TP3)=0.0605, where SGI311 is a displacement inparallel with the optical axis, from a point on the object-side surfaceof the third lens, through which the optical axis passes, to theinflection point on the object-side surface, which is the closest to theoptical axis, and SGI321 is a displacement in parallel with the opticalaxis, from a point on the image-side surface of the third lens, throughwhich the optical axis passes, to the inflection point on the image-sidesurface, which is the closest to the optical axis.

The third lens 130 further satisfies SGI312=−0.0367 mm and|SGI312|/(|SGI312|+TP3)=0.0668, where SGI312 is a displacement inparallel with the optical axis, from a point on the object-side surfaceof the third lens, through which the optical axis passes, to theinflection point on the object-side surface, which is the second closestto the optical axis.

The third lens 130 further satisfies HIF31|=0.2298 mm; HIF321=0.3393 mm;HIF311/HOI=0.1282; and HIF321/HOI=0.1893, where HIF311 is a distanceperpendicular to the optical axis between the inflection point on theobject-side surface of the third lens, which is the closest to theoptical axis, and the optical axis, and HIF321 is a distanceperpendicular to the optical axis between the inflection point on theimage-side surface of the third lens, which is the closest to theoptical axis, and the optical axis.

The third lens 130 further satisfies HIF312=0.8186 mm andHIF312/HOI=0.4568, where HIF312 is a distance perpendicular to theoptical axis between the inflection point on the object-side surface ofthe third lens, which is the second closest to the optical axis, and theoptical axis.

The infrared rays filter 170 is made of glass, and between the thirdlens 130 and the image plane 180. The infrared rays filter 170 gives nocontribution to the focal length of the system.

The optical image capturing system of the first preferred embodiment hasthe following parameters, which are f=2.42952 mm; f/HEP=2.02; andHAF=35.87 degrees and tan(HAF)=0.7231, where f is a focal length of thesystem; HAF is a half of the maximum field angle; and HEP is an entrancepupil diameter.

The parameters of the lenses of the first preferred embodiment aref1=2.27233 mm; |f/f1|=1.06962; f3=−7.0647 mm; |f1|<f3; and|f1/f3|=0.3216, where f1 is a focal length of the first lens 110; and f3is a focal length of the third lens 130.

The first preferred embodiment further satisfies f2=−5.2251 mm and|f2|>|f1|, where f2 is a focal length of the second lens 120 and f3 is afocal length of the third lens 130.

The optical image capturing system of the first preferred embodimentfurther satisfies ΣPPR=f/f1+f/f3=1.4131; ΣNPR=f/f2=0.4650;ΣPPR/|ΣNPR|=3.0391; |f/f3|=0.3439; |f1/f2|=0.4349; and |f2/f3|=0.7396,where PPR is a ratio of a focal length f of the optical image capturingsystem to a focal length fp of each of the lenses with positiverefractive power; and NPR is a ratio of a focal length f of the opticalimage capturing system to a focal length fn of each of lenses withnegative refractive power.

The optical image capturing system of the first preferred embodimentfurther satisfies InTL+InB=HOS; HOS=2.9110 mm; HOI=1.792 mm;HOS/HOI=1.6244; HOS/f=1.1982; InTL/HOS=0.7008; InS=2.25447 mm; andInS/HOS=0.7745, where InTL is a distance between the object-side surface112 of the first lens 110 and the image-side surface 134 of the thirdlens 130; HOS is a height of the image capturing system, i.e. a distancebetween the object-side surface 112 of the first lens 110 and the imageplane 180; InS is a distance between the aperture 100 and the imageplane 180; HOI is height for image formation of the optical imagecapturing system, i.e., the maximum image height; and InB is a distancebetween the image-side surface 134 of the third lens 130 and the imageplane 180.

The optical image capturing system of the first preferred embodimentfurther satisfies ΣTP=1.4198 mm and ΣTP/InTL=0.6959, where ΣTP is a sumof the thicknesses of the lenses 110-130 with refractive power. It ishelpful to the contrast of image and yield rate of manufacture, andprovides a suitable back focal length for installation of otherelements.

The optical image capturing system of the first preferred embodimentfurther satisfies |R1/R2|=0.3849, where R1 is a radius of curvature ofthe object-side surface 112 of the first lens 110, and R2 is a radius ofcurvature of the image-side surface 114 of the first lens 110. Itprovides the first lens with a suitable refractive power to reduce theincrease rate of the spherical aberration.

The optical image capturing system of the first preferred embodimentfurther satisfies (R5−R6)/(R5+R6)=−0.0899, where R5 is a radius ofcurvature of the object-side surface 132 of the third lens 130, and R6is a radius of curvature of the image-side surface 134 of the third lens130. It may modify the astigmatic field curvature.

The optical image capturing system of the first preferred embodimentfurther satisfies ΣPP=f1+f3=9.3370 mm and f1/(f1+f3)=0.2434, where ΣPPis a sum of the focal lengths fp of each lens with positive refractivepower. It is helpful to sharing the positive refractive powers of thefirst lens 110 to the other positive lenses to avoid the significantaberration caused by the incident rays.

The optical image capturing system of the first preferred embodimentfurther satisfies ΣNP=f2=−5.2251 mm, where f2 is a focal length of thesecond lens 120, and ΣNP is a sum of the focal lengths fn of each lenswith negative refractive power. It is helpful to avoiding thesignificant aberration caused by the incident rays.

The optical image capturing system of the first preferred embodimentfurther satisfies IN12=0.4068 mm and IN12/f=0.1674, where IN12 is adistance on the optical axis between the first lens 110 and the secondlens 120. It may correct chromatic aberration and improve theperformance.

The optical image capturing system of the first preferred embodimentfurther satisfies TP1=0.5132 mm; TP2=0.3363 mm; and(TP1+IN12)/TP2=2.7359, where TP1 is a central thickness of the firstlens 110 on the optical axis, and TP2 is a central thickness of thesecond lens 120 on the optical axis. It may control the sensitivity ofmanufacture of the system and improve the performance.

The optical image capturing system of the first preferred embodimentfurther satisfies (TP3+IN23)/TP2=2.3308, where TP3 is a centralthickness of the third lens 130 on the optical axis, TP2 is a centralthickness of the second lens 120 on the optical axis, and N23 is adistance on the optical axis between the second lens and the third lens.It may control the sensitivity of manufacture of the system and improvethe performance.

The optical image capturing system of the first preferred embodimentfurther satisfies TP2/ΣTP=0.2369, where ΣTP is a sum of the centralthicknesses of all the lenses with refractive power on the optical axis.It may finely modify the aberration of the incident rays and reduce theheight of the system.

The optical image capturing system of the first preferred embodimentfurther satisfies InRS11=0.30980 mm; InRS12=0.06425 mm; TP1=0.51321 mm;and (|InRS11|+TP1+|InRS12|)/TP1=1.7288, where InRS11 is a displacementin parallel with the optical axis from a point on the object-sidesurface 112 of the first lens, through which the optical axis passes, toa point at the maximum effective radius of the object-side surface 112of the first lens; InRS12 is a displacement in parallel with the opticalaxis from a point on the image-side surface 114 of the first lens,through which the optical axis passes, to a point at the maximumeffective radius of the image-side surface 134 of the first lens; andTP1 is a central thickness of the first lens 110 on the optical axis. Itmay control a ratio of the central thickness of the first lens 110 andthe effective radius thickness (thickness ratio) to increase the yieldrate of manufacture.

The optical image capturing system of the first preferred embodimentfurther satisfies InRS21=−0.17200 mm; InRS22=−0.22685 mm; TP2=0.33628mm; and (|InRS21|+TP2+|InRS22|)/TP2=2.1861, where InRS21 is adisplacement in parallel with the optical axis from a point on theobject-side surface 122 of the second lens, through which the opticalaxis passes, to a point at the maximum effective radius of theobject-side surface 122 of the second lens; InRS22 is a displacement inparallel with the optical axis from a point on the image-side surface124 of the second lens, through which the optical axis passes, to apoint at the maximum effective radius of the image-side surface 124 ofthe second lens; and TP2 is a central thickness of the second lens 120on the optical axis. It may control a ratio of the central thickness ofthe second lens 120 and the effective radius thickness (thickness ratio)to increase the yield rate of manufacture.

The optical image capturing system of the first preferred embodimentfurther satisfies InRS31=−0.10969 mm; InRS32=−0.31953 mm; TP3=0.57029mm; and (|InRS31|+TP3+|InRS32|)/TP3=1.7526, where InRS31 is adisplacement in parallel with the optical axis from a point on theobject-side surface 132 of the third lens, through which the opticalaxis passes, to a point at the maximum effective radius of theobject-side surface 132 of the third lens; InRS32 is a displacement inparallel with the optical axis from a point on the image-side surface134 of the third lens, through which the optical axis passes, to a pointat the maximum effective radius of the image-side surface 134 of thethird lens; and TP3 is a central thickness of the third lens 130 on theoptical axis. It may control a ratio of the central thickness of thethird lens 130 and the effective radius thickness (thickness ratio) toincrease the yield rate of manufacture.

The optical image capturing system of the first preferred embodimentfurther satisfies InRSO=0.59148 mm; InRSI=0.61063 mm; andΣ|InRS|=1.20211 mm, where Σ|InRS| is of an sum of absolute values of thedisplacements in parallel with the optical axis of each lens withrefractive power from the central point to the point at the maximumeffective radius, i.e. Σ|InRS|=InRSO+InRSI while InRSO is of a sum ofabsolute values of the displacements in parallel with the optical axisof each lens with refractive power from the central point on theobject-side surface to the point at the maximum effective radius of theobject-side surface, i.e. InRSO=|InRS11|+|InRS21|+|InRS31| and InRSI isof a sum of absolute values of the displacements in parallel with theoptical axis of each lens with refractive power from the central pointon the image-side surface to the point at the maximum effective radiusof the image-side surface, i.e. InRSI=|InRS12|+|InRS22|+|InRS32|. It mayincrease the capability of modifying the off-axis view field aberrationof the system. It may increase the capability of modifying the off-axisview field aberration of the system.

The optical image capturing system of the first preferred embodimentfurther satisfies Σ|InRS|/InTL=0.58925 and Σ|InRS|/HOS=0.41295. It mayreduce the total height of the system, and increase the capability ofmodifying the off-axis view field aberration of the system.

The optical image capturing system of the first preferred embodimentfurther satisfies |InRS21|+|InRS22|+|InRS31|+|InRS32|=0.82806 mm;(|InRS21|+|InRS22|+|InRS31|+|InRS32|)/InTL=0.40590; and(|InRS21|+|InRS22|+|InRS31|+|InRS32|)/HOS=0.28446. It could increase theyield rate of manufacture of the two lenses, which are the first and thesecond closest to the image side, and increase the capability ofmodifying the off-axis view field aberration of the system.

The optical image capturing system of the first preferred embodimentsatisfies HVT21=0 mm and HVT22=0 mm, where HVT21 a distanceperpendicular to the optical axis between the inflection point C21 onthe object-side surface 122 of the second lens and the optical axis; andHVT22 a distance perpendicular to the optical axis between theinflection point C22 on the image-side surface 124 of the second lensand the optical axis. It is helpful to modify the off-axis view fieldaberration.

The optical image capturing system of the first preferred embodimentsatisfies HVT31=0.4455 mm; HVT32=0.6479 mm; and HVT31/HVT32=0.6876,where HVT31 a distance perpendicular to the optical axis between theinflection point C31 on the object-side surface 132 of the third lensand the optical axis; and HVT32 a distance perpendicular to the opticalaxis between the inflection point C32 on the image-side surface 134 ofthe third lens and the optical axis. It is helpful to modify theoff-axis view field aberration.

The optical image capturing system of the first preferred embodimentsatisfies HVT32/HOI=0.3616. It is helpful to correction of theaberration of the peripheral view field of the optical image capturingsystem.

The optical image capturing system of the first preferred embodimentsatisfies HVT32/HOS=0.2226. It is helpful to correction of theaberration of the peripheral view field of the optical image capturingsystem.

The second and the third lenses 120, 130 have negative refractive power.The optical image capturing system of the first preferred embodimentfurther satisfies |NA2/NA1|=0.4006, where NA1 is an Abbe number of thefirst lens 110; NA2 is an Abbe number of the second lens 120; and NA3 isan Abbe number of the third lens 130. It may correct the aberration ofthe optical image capturing system.

The optical image capturing system of the first preferred embodimentsatisfies 0<(|InRS12|+|InRS21|)/IN12=0.5807;

0<(|InRS22|+|InRS31|)/IN23=1.5762, where IN12 is a distance on theoptical axis between the first lens 110 and the second lens 120, andIN23 is a distance on the optical axis between the second lens 120 andthe third lens 130. It is helpful to increase of the capacity ofadjustment of the optical path difference, and keeps the miniature size.

The optical image capturing system of the first preferred embodimentfurther satisfies |TDT|=1.2939% and |ODT|=1.4381%, where TDT is TVdistortion; and ODT is optical distortion.

The parameters of the lenses of the first embodiment are listed in Table1 and Table 2.

TABLE 1 f = 2.42952 mm; f/HEP = 2.02; HAF = 35.87 deg; tan(HAF) = 0.7231Radius of curvature Thickness Refractive Abbe Focal length Surface (mm)(mm) Material index number (mm) 0 Object plane 600 plastic 1 1^(st) lens0.849 0.513 plastic 1.535 56.070 2.273 2 2.205 0.143 3 Aperture Infinity0.263 4 2^(nd) lens −1.208  0.336 plastic 1.643 22.470 −5.225 5 −2.085 0.214 6 3^(rd) lens 1.178 0.570 plastic 1.544 56.090 7.012 7 1.411 0.1148 Filter Infinity 0.210 BK7_SCHOTT 9 Infinity 0.550 10 Image Infinity0.000 plane Reference wavelength: 555 nm; Position of blocking light:blocking at the first surface with effective diameter of 0.640 mm.

TABLE 2 Coefficients of the aspheric surfaces Surface 1 2 4 5 6 7 k1.22106E−01 1.45448E+01 8.53809E−01 4.48992E−01 −1.44104E+01−3.61090E+00 A4 −6.43320E−04  −9.87186E−02  −7.81909E−01  −1.69310E+00 −7.90920E−01 −5.19895E−01 A6 −2.58026E−02  2.63247E+00 −8.49939E−01 5.85139E+00  4.98290E−01  4.24519E−01 A8 1.00186E+00 −5.88099E+01 3.03407E+01 −1.67037E+01   2.93540E−01 −3.12444E−01 A10 −4.23805E+00 5.75648E+02 −3.11976E+02  2.77661E+01 −3.15288E−01  1.42703 E−01 A129.91922E+00 −3.00096E+03  1.45641E+03 −5.46620E+00  −9.66930E−02−2.76209E−02 A14 −1.17917E+01  7.91934E+03 −2.89774E+03  −2.59816E+01  1.67006E−01 −3.11872E−03 A16 8.87410E+00 −8.51578E+03  1.35594E+031.43091E+01 −4.43712E−02  1.34499E−03 A18 0.00000E+00 0.00000E+000.00000E+00 0.00000E+00  0.00000E+00  0.00000E+00 A20 0.00000E+000.00000E+00 0.00000E+00 0.00000E+00  0.00000E+00  0.00000E+00

The detail parameters of the first preferred embodiment are listed inTable 1, in which the unit of radius of curvature, thickness, and focallength are millimeter, and surface 0-10 indicates the surfaces of allelements in the system in sequence from the object side to the imageside. Table 2 is the list of coefficients of the aspheric surfaces, inwhich A1-A20 indicate the coefficients of aspheric surfaces from thefirst order to the twentieth order of each aspheric surface. Thefollowing embodiments have the similar diagrams and tables, which arethe same as those of the first embodiment, so we do not describe itagain.

Second Embodiment

As shown in FIG. 2A and FIG. 2B, an optical image capturing system ofthe second preferred embodiment of the present invention includes, alongan optical axis from an object side to an image side, a first lens 210,an aperture 200, a second lens 220, a third lens 230, an infrared raysfilter 270, an image plane 280, and an image sensor 290.

The first lens 210 has positive refractive power, and is made ofplastic. An object-side surface 212 thereof, which faces the objectside, is a convex aspheric surface, and an image-side surface 214thereof, which faces the image side, is a concave aspheric surface.

The second lens 220 has negative refractive power, and is made ofplastic. An object-side surface 222 thereof, which faces the objectside, is a concave aspheric surface, and an image-side surface 224thereof, which faces the image side, is a convex aspheric surface.

The third lens 230 has positive refractive power, and is made ofplastic. An object-side surface 232, which faces the object side, is aconvex aspheric surface, and an image-side surface 234, which faces theimage side, is a concave aspheric surface. The object-side surface 232has two inflection points, and the image-side surface 234 has aninflection point.

The infrared rays filter 270 is made of glass, and between the thirdlens 230 and the image plane 280. The infrared rays filter 270 gives nocontribution to the focal length of the system.

The optical image capturing system of the second preferred embodimenthas the following parameters, which are |f2|=7.5958 mm; |f1|=2.3367 mm;and |f2|>|f1|, where f1 is a focal length of the first lens 210 and f2is a focal length of the second lens 220.

The optical image capturing system of the second preferred embodimentfurther satisfies TP2=0.3503 mm and TP3=0.5049 mm, where TP2 is athickness of the second lens 220 on the optical axis, and TP3 is athickness of the third lens 230 on the optical axis.

In the second embodiment, the first and the third lenses 210 and 230 arepositive lenses, and their focal lengths are f1 and f3. The opticalimage capturing system of the second preferred embodiment furthersatisfies ΣPP=f1+f3=16.58739 mm and f1/(f1+f3)=0.14087, where ΣPP is asum of the focal lengths of each positive lens. It is helpful to sharingthe positive refractive powers of the first lens 210 to the otherpositive lenses to avoid the significant aberration caused by theincident rays.

The optical image capturing system of the second preferred embodimentfurther satisfies ΣNP=f2, where f2 is a focal length of the second lens220, and ΣNP is a sum of the focal lengths of each negative lens.

The parameters of the lenses of the second embodiment are listed inTable 3 and Table 4.

TABLE 3 f = 2.4443 mm; f/HEP = 2.3445; HAF = 35.5926 deg; tan(HAF) =0.7157 Radius of curvature Thickness Refractive Abbe Focal lengthSurface (mm) (mm) Material index number (mm) 0 Object plane 600 plastic1 1^(st) lens 0.89924675  0.484 plastic 1.535 56.070 2.337 2 2.5854776660.092 3 Aperture Infinity 0.352 4 2^(nd) lens −1.306912418  0.350plastic 1.636 23.890 −7.596 5 −1.974163721  0.248 6 3^(rd) lens1.031227636 0.505 plastic 1.535 56.070 14.251 7 0.988319997 0.116 8Filter Infinity 0.210 BK7_SCHOTT 9 Infinity 0.550 10 Image Infinity0.000 plane Reference wavelength: 555 nm

TABLE 4 Coefficients of the aspheric surfaces Surface 1 2 4 5 6 7 k 4.21557E−01  1.17788E+01 −8.47497E−02 −3.75159E+00 −1.22013E+01−5.46535E+00 A4 −1.00375E−01 −1.32434E−01 −6.46650E−01 −1.65578E+00−8.26318E−01 −4.71291E−01 A6  3.05782E−01  3.09030E+00 −3.03937E+00 5.88730E+00  5.09889E−01  4.21003E−01 A8 −1.47510E+00 −5.75916E+01 4.99637E+01 −1.68301E+01  3.05388E−01 −3.14347E−01 A10 −7.63415E−01 5.63846E+02 −3.82239E+02  2.75295E+01 −3.18573E−01  1.42937E−01 A12 1.64877E+01 −2.99356E+03  1.49546E+03 −6.55406E+00 −9.97160E−02−2.69970E−02 A14 −3.94093E+01  7.96284E+03 −2.74780E+03 −2.71039E+01 1.72775E−01 −3.80345E−03 A16  2.52419E+01 −8.26865E+03  1.44313E+03 1.87183E+01 −4.67886E−02  1.82731E−03 A18 A20

An equation of the aspheric surfaces of the second embodiment is thesame as that of the first embodiment, and the definitions are the sameas well.

The exact parameters of the second embodiment based on Table 3 and Table4 are listed in the following table:

Second embodiment (Reference wavelength: 555 nm) InRS11 InRS12 InRS21InRS22 InRS31 InRS32 0.32433 0.05024 −0.16490 −0.23221 −0.09892 −0.16970InRSO InRSI Σ|InRS| Σ|InRS|/ Σ|InRS|/ InTL HOS 0.58815 0.45214 1.040290.51221 0.35783 |InRS31|/TP3 |InRS32|/TP3 (|InRS12| + |InRS21|)/IN12(|InRS22| + |InRS31|)/IN23 0.19594 0.33611 0.4851 1.3327 (|InRS21| +|InRS22| + |InRS31| + |InRS32|)/ (|InRS21| + |InRS22| + |InRS31| +|InRS32|)/ InTL HOS 0.32778 0.22899 |f/f1| |f/f2| |f/f3| |f1/f3| |f1/f2||f2/f3| 1.04607 0.32180 0.17152 6.09867 3.25067 1.87613 ΣPPR ΣNPR ΣPPR/ΣPP ΣNP f1/ΣPP |ΣNPR| 1.21759 0.32180 3.78368 16.58739 −7.59580 0.14087IN12/f |ODT| |TDT| (TP1 + IN12)/ (TP3 + IN23)/ TP2/ΣTP TP2 TP2 0.181431.83332 0.80679 2.15036 2.15036 0.26162 InTL HOS HOS/HOI InS/HOSInTL/HOS ΣTP/InTL 2.90726 2.03100 1.62235 0.80208 0.69860 0.65931 HVT21HVT22 HVT31 HVT32 HVT32/HOI HVT32/HOS 0 0 0.45744 0.71496 0.398970.24592

Third Embodiment

As shown in FIG. 3A and FIG. 3B, an optical image capturing system ofthe third preferred embodiment of the present invention includes, alongan optical axis from an object side to an image side, a first lens 310,an aperture 300, a second lens 320, a third lens 330, an infrared raysfilter 370, an image plane 380, and an image sensor 390.

The first lens 310 has positive refractive power, and is made ofplastic. An object-side surface 312 thereof, which faces the objectside, is a convex aspheric surface, and an image-side surface 314thereof, which faces the image side, is a concave aspheric surface.

The second lens 320 has negative refractive power, and is made ofplastic. An object-side surface 322 thereof, which faces the objectside, is a concave aspheric surface, and an image-side surface 324thereof, which faces the image side, is a convex aspheric surface. Theimage-side surface 324 has an inflection point.

The third lens 330 has positive refractive power, and is made ofplastic. Both an object-side surface 332, which faces the object side,and an image-side surface 334, which faces the image side, are a convexaspheric surfaces, and both the object-side surface 332 and theimage-side surface 334 each has two inflection points.

The infrared rays filter 370 is made of glass, and between the thirdlens 330 and the image plane 380. The infrared rays filter 370 gives nocontribution to the focal length of the system.

The parameters of the lenses of the third preferred embodiment are|f2|=5.2210 mm; |f1|=2.2319; and |f2|>|f1|, where f1 is a focal lengthof the first lens 310 and f2 is a focal length of the second lens 320.

The optical image capturing system of the third preferred embodimentfurther satisfies TP2=0.3494 mm and TP3=0.5591 mm, where TP2 is athickness of the second lens 320 on the optical axis, and TP3 is athickness of the third lens 330 on the optical axis.

The optical image capturing system of the third preferred embodimentfurther satisfies ΣPP=f1+f3=9.59177 mm and f1/(f1+f3)=0.23269, where ΣPPis a sum of the focal lengths of each positive lens. It is helpful tosharing the positive refractive powers of the first lens 310 to theother positive lenses to avoid the significant aberration caused by theincident rays.

The optical image capturing system of the third preferred embodimentfurther satisfies ΣNP=f2, where f2 is a focal length of the second lens320 and ΣNP is a sum of the focal lengths of each negative lens.

The parameters of the lenses of the third embodiment are listed in Table5 and Table 6.

TABLE 5 f = 2.4114 mm; f/HEP = 2.22; HAF = 36.0 deg; tan(HAF) = 0.7265Radius of curvature Thickness Refractive Abbe Focal length Surface (mm)(mm) Material index number (mm) 0 Object plane 600 1 1^(st) lens 0.8400.468 plastic 1.535 56.070 2.232 2 2.272 0.148 3 Aperture Infinity 0.2774 2^(nd) lens −1.157  0.349 plastic 1.643 22.470 −5.221 5 −1.968  0.2216 3^(rd) lens 1.152 0.559 plastic 1.544 56.090 7.360 7 1.338 0.123 8Filter Infinity 0.210 BK7_SCHOTT 9 Infinity 0.550 10 Image Infinity0.000 plane Reference wavelength: 555 nm; Position of blocking light:blocking at the first surface with effective diameter of 0.640 mm.

TABLE 6 Coefficients of the aspheric surfaces Surface 1 2 4 5 6 7 k 1.2211E−01  1.4545E+01  8.5381E−01  4.4899E−01 −1.4410E+01 −3.6109E+00A4 −6.4332E−04 −9.8719E−02 −7.8191E−01 −1.6931E+00 −7.9092E−01−5.1989E−01 A6 −2.5803E−02  2.6325E+00 −8.4994E−01  5.8514E+00 4.9829E−01  4.2452E−01 A8  1.0019E+00 −5.8810E+01  3.0341E+01−1.6704E+01  2.9354E−01 −3.1244E−01 A10 −4.2381E+00  5.7565E+02−3.1198E+02  2.7766E+01 −3.1529E−01  1.4270E−01 A12  9.9192E+00−3.0010E+03  1.4564E+03 −5.4662E+00 −9.6693E−02 −2.7621E−02 A14−1.1792E+01  7.9193E+03 −2.8977E+03 −2.5982E+01  1.6701E−01 −3.1187E−03A16  8.8741E+00 −8.5158E+03  1.3559E+03  1.4309E+01 −4.4371E−02 1.3450E−03 A18 A20

An equation of the aspheric surfaces of the third embodiment is the sameas that of the first embodiment, and the definitions are the same aswell.

The exact parameters of the third embodiment based on Table 5 and Table6 are listed in the following table:

Third embodiment (Reference wavelength: 555 nm) InRS11 InRS12 InRS21InRS22 InRS31 InRS32 0.31575 0.06070 −0.15851 −0.21997 −0.09220 −0.29810InRSO InRSI Σ|InRS| Σ|InRS|/ Σ|InRS|/ InTL HOS 0.56645 0.57877 1.145220.56626 0.39467 |InRS31|/TP3 |InRS32|/TP3 (|InRS12| + |InRS21|)/IN12(|InRS22| + |InRS31|)/IN23 0.16491 0.53320 0.5155 1.4141 (|InRS21| +|InRS22| + |InRS31| + |InRS32|)/ (|InRS21| + |InRS22| + |InRS31| +|InRS32|)/ InTL HOS 0.38012 0.26493 |f/f1| |f/f2| |f/f3| |f1/f3| |f1/f2||f2/f3| 1.08042 0.46186 0.32763 3.29764 2.33928 1.40968 ΣPPR ΣNPR ΣPPR/ΣPP ΣNP f1/ΣPP |ΣNPR| 1.40805 0.46186 3.04866 9.59177 −5.22096 0.23269IN12/f |ODT| |TDT| (TP1 + IN12)/ (TP3 + IN23)/ TP2/ΣTP TP2 TP2 0.176361.50000 0.71008 2.23183 2.23183 0.25386 InTL HOS HOS/HOI InS/HOSInTL/HOS ΣTP/InTL 2.90175 2.02243 1.61928 0.78770 0.69697 0.68057 HVT21HVT22 HVT31 HVT32 HVT32/HOI HVT32/HOS 0 0 0.46887 0.67544 0.376920.23277

Fourth Embodiment

As shown in FIG. 4A and FIG. 4B, an optical image capturing system ofthe fourth preferred embodiment of the present invention includes, alongan optical axis from an object side to an image side, a first lens 410,an aperture 400, a second lens 420, a third lens 430, an infrared raysfilter 470, an image plane 480, and an image sensor 490.

The first lens 410 has positive refractive power, and is made ofplastic. An object-side surface 412 thereof, which faces the objectside, is a convex aspheric surface, and an image-side surface 414thereof, which faces the image side, is a concave aspheric surface.

The second lens 420 has negative refractive power, and is made ofplastic. An object-side surface 422 thereof, which faces the objectside, is a convex aspheric surface, and an image-side surface 424thereof, which faces the image side, is a concave aspheric surface. Theimage-side surface 424 has an inflection point.

The third lens 430 has positive refractive power, and is made ofplastic. Both an object-side surface 432, which faces the object side,and an image-side surface 434, which faces the image side, are convexaspheric surfaces. The object-side surface 432 has two inflectionpoints, and the image-side surface 434 has an inflection point.

The infrared rays filter 470 is made of glass, and between the thirdlens 430 and the image plane 480. The infrared rays filter 470 gives nocontribution to the focal length of the system.

The optical image capturing system of the fourth preferred embodimenthas the following parameters, which are |f2|=5.5386 mm; |f1|=2.2762 mm;and |f2|>|f1|, where f1 is a focal length of the first lens 410 and f2is a focal length of the second lens 420.

The optical image capturing system of the fourth preferred embodimentfurther satisfies TP2=0.3347 mm and TP3=0.5056 mm, where TP2 is athickness of the second lens 420 on the optical axis, and TP3 is athickness of the third lens 430 on the optical axis.

In the fourth embodiment, the first and the third lenses 410 and 430 arepositive lenses, and their focal lengths are f1 and f3. The opticalimage capturing system of the fourth preferred embodiment furthersatisfies ΣPP=f143=9.09819 mm and f1/(f1+f3)=0.25018, where ΣPP is a sumof the focal lengths of each positive lens. It is helpful to sharing thepositive refractive powers of the first lens 410 to the other positivelenses to avoid the significant aberration caused by the incident rays.

The optical image capturing system of the fourth preferred embodimentfurther satisfies ΣNP=f2, where f2 is a focal length of the second lens420, and ΣNP is a sum of the focal lengths of each negative lens.

The parameters of the lenses of the fourth embodiment are listed inTable 7 and Table 8.

TABLE 7 f = 2.4125 mm; f/HEP = 2.2; HAF = 36 deg; tan(HAF) = 0.7265Radius of curvature Thickness Refractive Abbe Focal length Surface (mm)(mm) Material index number (mm) 0 Object plane 600 plastic 1 1^(st) lens0.851312071 0.495164789 plastic 1.535 56.07 2.276 2 2.24E+00 0.1328910373 Aperture Infinity 0.281052598 4 2^(nd) lens −1.129309605  0.334690731plastic 1.643 22.47 −5.539 5 −1.84E+00  0.221643734 6 3^(rd) lens1.114126731 0.505618418 plastic 1.544 56.09 6.822 7 1.33E+00 0.1188631738 Filter Infinity 0.21 BK7_SCHOTT 9 Infinity 0.55007551 10 ImageInfinity 0.050000011 plane Reference wavelength: 555 nm; Position ofblocking light: blocking at the first surface with effective diameter of0.69 mm.

TABLE 8 Coefficients of the aspheric surfaces Surface 1 2 4 5 6 7 k 1.22106E−01  1.45448E+01  8.53809E−01  4.48992E−01 −1.44104E+01−3.61090E+00 A4 −6.43320E−04 −9.87186E−02 −7.81909E−01 −1.69310E+00−7.90920E−01 −5.19895E−01 A6 −2.58026E−02  2.63247E+00 −8.49939E−01 5.85139E+00  4.98290E−01  4.24519E−01 A8  1.00186E+00 −5.88099E+01 3.03407E+01 −1.67037E+01  2.93540E−01 −3.12444E−01 A10 −4.23805E+00 5.75648E+02 −3.11976E+02  2.77661E+01 −3.15288E−01  1.42703E−01 A12 9.91922E+00 −3.00096E+03  1.45641E+03 −5.46620E+00 −9.66930E−02−2.76209E−02 A14 −1.17917E+01  7.91934E+03 −2.89774E+03 −2.59816E+01 1.67006E−01 −3.11872E−03 A16  8.87410E+00 −8.51578E+03  1.35594E+03 1.43091E+01 −4.43712E−02  1.34499E−03 A18 A20

An equation of the aspheric surfaces of the fourth embodiment is thesame as that of the first embodiment, and the definitions are the sameas well.

The exact parameters of the fourth embodiment based on Table 7 and Table8 are listed in the following table:

Fourth embodiment (Reference wavelength: 555 nm) InRS11 InRS12 InRS21InRS22 InRS31 InRS32 0.37973 0.06539 −0.16166 −0.22180 −0.09575 −0.31402InRSO InRSI Σ|InRS| Σ|InRS|/ Σ|InRS|/ InTL HOS 0.63713 0.60121 1.238340.62826 0.42701 |InRS31|/TP3 |InRS32|/TP3 (|InRS12| + |InRS21|)/IN12(|InRS22| + |InRS31|)/IN23 0.18937 0.62107 0.5485 1.4327 (|InRS21| +|InRS22| + |InRS31| + |InRS32|)/ (|InRS21| + |InRS22| + |InRS31| +|InRS32|)/ InTL HOS 0.40244 0.27353 |f/f1| |f/f2| |f/f3| |f1/f3| |f1/f2||f2/f3| 1.05988 0.43557 0.35363 2.99713 2.43329 1.23172 ΣPPR ΣNPR ΣPPR/ΣPP ΣNP f1/ΣPP |ΣNPR| 1.41351 0.43557 3.24516 9.09819 −5.53860 0.25018IN12/f |ODT| |TDT| (TP1 + IN12)/ (TP3 + IN23)/ TP2/ΣTP TP2 TP2 0.171591.50544 0.46593 2.17294 2.17294 0.25062 InTL HOS HOS/HOI InS/HOSInTL/HOS ΣTP/InTL 2.90000 1.97106 1.61830 0.78343 0.67968 0.67754 HVT21HVT22 HVT31 HVT32 HVT32/HOI HVT32/HOS 0 0 0.47758 0.65370 0.364790.22541

Fifth Embodiment

As shown in FIG. 5A and FIG. 5B, an optical image capturing system ofthe fifth preferred embodiment of the present invention includes, alongan optical axis from an object side to an image side, an aperture 500, afirst lens 510, a second lens 520, a third lens 530, an infrared raysfilter 570, an image plane 580, and an image sensor 590.

The first lens 510 has positive refractive power, and is made ofplastic. An object-side surface 512, which faces the object side, is aconvex aspheric surface, and an image-side surface 514, which faces theimage side, is a concave aspheric surface.

The second lens 520 has positive refractive power, and is made ofplastic. An object-side surface 522 thereof, which faces the objectside, is a concave aspheric surface, and an image-side surface 524thereof, which faces the image side, is a convex aspheric surface. Theimage-side surface 524 has two inflection points.

The third lens 530 has negative refractive power, and is made ofplastic. An object-side surface 532, which faces the object side, is aconvex aspheric surface, and an image-side surface 534, which faces theimage side, is a concave aspheric surface. The object-side surface 532has three inflection points, and the image-side surface 534 has aninflection point.

The infrared rays filter 570 is made of glass, and between the thirdlens 530 and the image plane 580. The infrared rays filter 570 gives nocontribution to the focal length of the system.

The parameters of the lenses of the fifth preferred embodiment are|f2|=1.387 mm; |f1|=1.452 mm; and |f2|<|f1|, where f1 is a focal lengthof the first lens 510 and f2 is a focal length of the second lens 520.

The optical image capturing system of the fifth preferred embodimentfurther satisfies TP2=0.242 mm and TP3=0.294 mm, where TP2 is athickness of the second lens 520 on the optical axis, and TP3 is athickness of the third lens 530 on the optical axis.

The optical image capturing system of the fifth preferred embodimentfurther satisfies ΣPP=f1+f2=2.83947 mm and f1/(f1+f2)=0.51149, where f1is a focal length of the first lens 510, f2 is a focal length of thesecond lens 520, and ΣPP is a sum of the focal lengths of each positivelens. It is helpful to sharing the positive refractive powers of thefirst lens 510 to the other positive lenses to avoid the significantaberration caused by the incident rays.

The optical image capturing system of the fifth preferred embodimentfurther satisfies ΣNP=f3, where ΣNP is a sum of the focal lengths ofeach negative lens.

The parameters of the lenses of the fifth embodiment are listed in Table9 and Table 10.

TABLE 9 f = 1.340 mm; f/HEP = 2.46; HAF = 38.834 deg; tan(HAF) = 0.8050Radius of curvature Thickness Refractive Abbe Focal length Surface (mm)(mm) Material index number (mm) 0 Object plane 600 1 plane 0.102 2Aperture plane −0.08312 3 1^(st) lens 0.49281 0.29050 plastic 1.53556.05 1.452 4 1.06545 0.21304 5 2^(nd) lens −0.96594  0.24240 plastic1.535 56.05 1.387 6 −0.45709  0.03527 7 3^(rd) lens 16.05009  0.29395plastic 1.535 56.05 −1.254 8 0.64146 0.10900 9 Filter plane 0.21 10plane 0.237 11 Image plane 0 plane Reference wavelength: 555 nm

TABLE 10 Coefficients of the aspheric surfaces Surface 3 4 5 6 7 8 k2.01824E−02 9.55965E+00 −4.41020E+01 −1.23809E+01 −1.53530E+04−6.45641E+00 A4 2.73779E−01 9.36063E−01 −3.97557E+00 −9.99887E+00−2.47339E+00 −2.76537E+00 A6 −1.74068E+01  6.83878E+00  2.79159E+01 1.81093E+02  1.54556E+01  1.48443 E+01 A8 1.22816E+03 −9.31427E+02  1.39349E+03 −2.00026E+03 −5.09297E+01 −6.18536E+01 A10 −3.35987E+04 3.32362E+04 −5.27979E+04  1.50954E+04  1.29379E+02  1.67430E+02 A124.95528E+05 −5.79704E+05   7.72144E+05 −7.06870E+04 −2.55156E+02−2.67187E+02 A14 −3.90842E+06  4.95867E+06 −5.01063E+06  1.84693E+05 2.71245E+02  1.81948E+02 A16 1.30544E+07 −1.63270E+07   3.64087E+06−2.22351E+05 −6.02299E+01  9.99102E+01 A18 0.00000E+00 0.00000E+00 1.14092E+08  3.64341E+04 −6.24963E+01 −2.46729E+02 A20 0.00000E+000.00000E+00 −4.19185E+08  8.63213E+04 −2.79496E+00  1.15666E+02

An equation of the aspheric surfaces of the fifth embodiment is the sameas that of the first embodiment, and the definitions are the same aswell.

The exact parameters of the fifth embodiment based on Table 9 and Table10 are listed in the following table:

Fifth embodiment (Reference wavelength: 555 nm) InRS11 InRS12 InRS21InRS22 InRS31 InRS32 0.08800 0.05900 −0.06967 −0.12995 −0.03679 −0.04875InRSO InRSI Σ|InRS| Σ|InRS|/ Σ|InRS|/ InTL HOS 0.19446 0.23771 0.432170.40196 0.26494 |InRS31|/TP3 |InRS32|/TP3 (|InRS12| + |InRS21|)/IN12(|InRS22| + |InRS31|)/IN23 0.12516 0.16586 0.6040 4.7282 (|InRS21| +|InRS22| + |InRS31| + |InRS32|)/ (|InRS21| + |InRS22| + |InRS31| +|InRS32|)/ InTL HOS 0.26523 0.17483 |f/f1| |f/f2| |f/f3| |f1/f3| |f1/f2||f2/f3| 0.92259 0.96600 1.06842 0.86351 0.95506 0.90414 ΣPPR ΣNPR ΣPPR/ΣPP ΣNP f1/ΣPP |ΣNPR| 1.88859 1.06842 1.76764 2.83947 −1.2541 0.51149IN12/f |ODT| |TDT| (TP1 + IN12)/ (TP3 + IN23)/ TP2/ΣTP TP2 TP2 0.158990.81360 0.57628 1.35819 1.35819 0.29316 InTL HOS HOS/HOI InS/HOSInTL/HOS ΣTP/InTL 1.63116 1.07516 1.50754 0.94904 0.65914 0.76905 HVT21HVT22 HVT31 HVT32 HVT32/HOI HVT32/HOS 0 0 0.07573 0.45922 0.424410.28153

It must be pointed out that the embodiments described above are onlysome preferred embodiments of the present invention. All equivalentstructures which employ the concepts disclosed in this specification andthe appended claims should fall within the scope of the presentinvention.

What is claimed is:
 1. An optical image capturing system, in order alongan optical axis from an object side to an image side, comprising: afirst lens having positive refractive power; a second lens havingrefractive power; a third lens having refractive power; and an imageplane; wherein the optical image capturing system consists of the threelenses with refractive power; the third lens has positive refractivepower; the third lens has an object-side surface, which faces the objectside, and an image-side surface, which faces the image side, and boththe object-side surface and the image-side surface of the third lens areaspheric surfaces; wherein the optical image capturing system satisfies:1.2≦f/HEP≦3.5; 0.5≦HOS/f≦3.0; and 0<Σ|InRS|/InTL≦3; where f is a focallength of the optical image capturing system; HEP is an entrance pupildiameter of the optical image capturing system; and HOS is a distance inparallel with the optical axis from an object-side surface of the firstlens to the image plane; InTL is a distance between the object-sidesurface of the first lens and the image-side surface of the third lens;and a sum of an absolute value of each distance in parallel with theoptical axis from a maximum effective diameter position on anobject-side surface three of each of the three lens elements to an axialpoint on the object-side surface of each of the lens elements is InRSO,a sum of an absolute value of each distance in parallel with the opticalaxis from a maximum effective diameter position on an image-side surfaceof each of the three lens elements to an axial point on the image-sidesurface of each of the three lens elements is InRSI, a sum of InRSO andInRSI is Σ|InRS|.
 2. The optical image capturing system of claim 1,wherein the optical image capturing system further satisfies:|TDT|<60%; where TDT is a TV distortion.
 3. The optical image capturingsystem of claim 1, wherein the optical image capturing system furthersatisfies:|ODT|≦50%; where ODT is an optical distortion.
 4. The optical imagecapturing system of claim 1, wherein the optical image capturing systemfurther satisfies:0 mm<HOS≦7 mm.
 5. The optical image capturing system of claim 1, whereinthe optical image capturing system further satisfies:0 degree<HAF≦70 degrees; where HAF is a half of a view angle of theoptical image capturing system.
 6. The optical image capturing system ofclaim 1, wherein the second lens has negative refractive power.
 7. Theoptical image capturing system of claim 1, wherein the optical imagecapturing system further satisfies:0.45≦InTL/HOS≦0.9.
 8. The optical image capturing system of claim 1,wherein the optical image capturing system further satisfies:0.45≦ΣTP/InTL≦0.95; where ΣTP is a sum of thicknesses of the lenseshaving refractive power.
 9. The optical image capturing system of claim1, further comprising an aperture, wherein the optical image capturingsystem further satisfies:0.5≦InS/HOS≦1.1; where InS is a distance in parallel with the opticalaxis between the aperture and the image plane.
 10. An optical imagecapturing system, in order along an optical axis from an object side toan image side, comprising: a first lens having positive refractivepower; a second lens having refractive power; a third lens havingrefractive power; and an image plane; wherein the optical imagecapturing system consists of the three lenses with refractive power; atleast two of the lenses from the first lens to the third lens each hasat least an inflection point at a surface thereof; the third lens haspositive refractive power; the third lens has an object-side surface,which faces the object side, and an image-side surface, which faces theimage side, and both the object-side surface and the image-side surfaceof the third lens are aspheric surfaces; wherein the optical imagecapturing system satisfies: 1.2≦f/HEP≦3.5; 0.5≦HOS/f≦3.0;0<Σ|InRS|/InTL≦3; where f is a focal length of the optical imagecapturing system; HEP is an entrance pupil diameter of the optical imagecapturing system; HOS is a distance in parallel with the optical axisbetween an object-side surface, which face the object side, of the firstlens and the image plane; InTL is a distance between the object-sidesurface of the first lens and the image-side surface of the third lens;and a sum of an absolute value of each distance in parallel with theoptical axis from a maximum effective diameter position on anobject-side surface of each of the lens elements to an axial point onthe object-side surface of each of the three lens elements is InRSO, asum of an absolute value of each distance in parallel with the opticalaxis from a maximum effective diameter position on an image-side surfaceof each of the three lens elements to an axial point on the image-sidesurface of each of the three lens elements is InRSI, a sum of InRSO andInRSI is Σ|InRS|.
 11. The optical image capturing system of claim 10,wherein the third lens has positive refractive power, and at least oneof the object-side surface and the image-side surface of the third lenshas at least an inflection point.
 12. The optical image capturing systemof claim 10, wherein the optical image capturing system furthersatisfies:0.5≦ΣPPR≦10; where PPR is a ratio of the focal length f of the opticalimage capturing system to a focal length fp of each of lenses withpositive refractive power.
 13. The optical image capturing system ofclaim 10, wherein the optical image capturing system further satisfies:|TDT|<60% and |ODT|≦50%; where TDT is a TV distortion; and ODT is anoptical distortion.
 14. The optical image capturing system of claim 10,wherein the second lens has negative refractive power.
 15. The opticalimage capturing system of claim 10, wherein the optical image capturingsystem further satisfies:0 mm<Σ|InRS|≦10 mm.
 16. The optical image capturing system of claim 10,wherein the optical image capturing system further satisfies:0 mm<|InRS21|+|InRS22|+|InRS31|+|InRS32|≦8 mm; where InRS21 is adisplacement in parallel with the optical axis from a point on theobject-side surface of the second lens, through which the optical axispasses, to a point at the maximum effective radius of the object-sidesurface of the second lens; InRS22 is a displacement in parallel withthe optical axis from a point on the image-side surface of the secondlens, through which the optical axis passes, to a point at the maximumeffective radius of the image-side surface of the second lens; InRS31 isa displacement in parallel with the optical axis from a point on theobject-side surface of the third lens, through which the optical axispasses, to a point at the maximum effective radius of the object-sidesurface of the third lens; InRS32 is a displacement in parallel with theoptical axis from a point on the image-side surface of the third lens,through which the optical axis passes, to a point at the maximumeffective radius of the image-side surface of the third lens.
 17. Theoptical image capturing system of claim 16, wherein the optical imagecapturing system further satisfies:0<(|InRS21|+|InRS22|+|InRS31|+|InRS32|)/InTL2.
 18. The optical imagecapturing system of claim 16, wherein the optical image capturing systemfurther satisfies:0<(|InRS21|+|InRS22|+|InRS31|+|InRS32|)/HOS≦2.
 19. The optical imagecapturing system of claim 10, wherein the optical image capturing systemfurther satisfies:0<f1/ΣPP≦0.8; where f1 is a focal length of the first length; ΣPP is asum of the focal lengths of the lenses having positive refractive power.20. An optical image capturing system, in order along an optical axisfrom an object side to an image side, comprising: a first lens havingpositive refractive power; a second lens having negative refractivepower; a third lens having refractive power, wherein the third lens anobject-side surface, which faces the object side, and an image-sidesurface, which faces the image side, and at least one of the object-sidesurface and the image-side surface of the third lens has at least aninflection point; and an image plane; wherein the optical imagecapturing system consists of the three lenses having refractive power;and at least two of the first lens and the second lens each has aninflection point on a surface thereof; the first lens has an object-sidesurface, which faces the object side, and an image-side surface, whichfaces the image side; both the object-side surface and the image-sidesurface of the first lens are aspheric surfaces, and both theobject-side surface and the image-side surface of the third lens areaspheric surfaces; wherein the optical image capturing system satisfies:1.2≦f/HEP≦3.5; 0.4≦|tan(HAF)|≦1.5; 0.5≦HOS/f≦2.5; |TDT|<1.5%;|ODT|≦2.5%; and 0<Σ|InRS|/InTL≦3; where f is a focal length of theoptical image capturing system; HEP is an entrance pupil diameter of theoptical image capturing system; HAF is a half of a view angle of theoptical image capturing system; HOS is a distance in parallel with theoptical axis between an object-side surface, which face the object side,of the first lens and the image plane; TDT is a TV distortion; and ODTis an optical distortion; InTL is a distance between the object-sidesurface of the first lens and the image-side surface of the third lens;and a sum of an absolute value of each distance in parallel with theoptical axis from a maximum effective diameter position on anobject-side surface of each of the lens elements to an axial point onthe object-side surface of each of the three lens elements is InRSO, asum of an absolute value of each distance in parallel with the opticalaxis from a maximum effective diameter position on an image-side surfaceof each of the three lens elements to an axial point on the image-sidesurface of each of the three lens elements is InRSI, a sum of InRSO andInRSI is Σ|InRS|.
 21. The optical image capturing system of claim 20,wherein the optical image capturing system further satisfies:0<f1/ΣPP≦0.8; where f1 is a focal length of the first length; ΣPP is asum of the focal lengths of the lenses having positive refractive power.22. The optical image capturing system of claim 20, wherein the opticalimage capturing system further satisfies:0 mm<HOS≦7 mm.
 23. The optical image capturing system of claim 20,wherein the optical image capturing system further satisfies:0 mm<|InRS21|+|InRS22|+|InRS31|+|InRS32|≦8 mm; where InRS21 is adisplacement in parallel with the optical axis from a point on theobject-side surface of the second lens, through which the optical axispasses, to a point at the maximum effective radius of the object-sidesurface of the second lens; InRS22 is a displacement in parallel withthe optical axis from a point on the image-side surface of the secondlens, through which the optical axis passes, to a point at the maximumeffective radius of the image-side surface of the second lens; InRS31 isa displacement in parallel with the optical axis from a point on theobject-side surface of the third lens, through which the optical axispasses, to a point at the maximum effective radius of the object-sidesurface of the third lens; InRS32 is a displacement in parallel with theoptical axis from a point on the image-side surface of the third lens,through which the optical axis passes, to a point at the maximumeffective radius of the image-side surface of the third lens.
 24. Theoptical image capturing system of claim 23, wherein the optical imagecapturing system further satisfies:0<(|InRS21|+|InRS22|+|InRS31|+|InRS32|)/InTL≦2.
 25. The optical imagecapturing system of claim 23, further comprising an aperture and animage sensor on the image plane, wherein the optical image capturingsystem further satisfies:0.5≦InS/HOS≦1.1; where InS is a distance in parallel with the opticalaxis between the aperture and the image plane.